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Method and computer for recovering deleted jpg files from disk

A computer and deleted technology, applied in the computer field, can solve problems such as large files and achieve the effect of strong versatility

Inactive Publication Date: 2011-12-28
WONDERSHARE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the recovery method provided by the above-mentioned prior art is that the recovered files are often relatively large, and some picture viewing software cannot correctly display such pictures with a lot of junk data at the end of the file

Method used

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  • Method and computer for recovering deleted jpg files from disk
  • Method and computer for recovering deleted jpg files from disk
  • Method and computer for recovering deleted jpg files from disk

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Embodiments of the present invention provide a method for recovering deleted JPG files from a disk, such as figure 1 As shown, the method includes the steps of:

[0031] S110, look for the file header characteristic code of JPG file, look for the sector with file header characteristic code in disk, and record the offset of this sector as start position; Specifically in this step S110: search in disk with "ff d8 ff e0", "ff d8 ff e1", "ff d8 ff ed", or "ff d8 ff ff fe". Except "ff d8 ff e000 10 41 56 49 31", this feature code is a key frame in an avi (Audio Video Interleaved, audio and vide...

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Abstract

The invention relates to a method and a system for restoring a deleted joint picture group (JPG) file from a disk. The method comprises the following steps of: searching file header feature codes of the JPG file and a sector with the file header feature codes in the disk, and recording the excursion of the sector as an initial position; finding a sign of a JPG intermediate file compression packet in the sector, recording the position of the sign of the JPG intermediate file compression packet as a current position, and otherwise, reading a 16-bit integral number from the sign of the JPG intermediate file compression packet, and recording the value of the integral number as L; executing the operation repeatedly from the position by adding the current position and L; and determining data between the initial position and the current position as the content of the integral JPG file, and reading and storing the content of the JPG file to restore the JPG file. In the method, the deleted file is restored according to the content of the file, the content of the restored file is the same as that of a real file, the generality is high, and the JPG file can be used and checked in various file systems.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a method for recovering deleted JPG files from a disk and a computer. Background technique [0002] In the field of data recovery, software recovery can be divided into two methods: 1. Recovery based on file system structure; 2. Recovery based on file content. The first method is based on the characteristics of the file system. For example, the NTFS (New Technology File System, which is the file system of the Windows NT operating environment and the Windows NT advanced server network operating system environment) file system will mark the deleted file, but the file is stored Critical information such as location is still there. The second way is to use some known signature of the file, usually a few bytes at the beginning of the file. The recovery quality of the first recovery method is better, and the file name can usually be obtained. The disadvantage is that it is not easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
Inventor 冯星
Owner WONDERSHARE TECH CO LTD